Attachment for type-writers and other machines.



vv. T. MACDONALD L s. w. SCOTT. APPLICATION Fl-LED APR. I3, 1917 u Patented Apr. 16, l1918 4 SHEE`|5-VSH EE l.

ATTACHME'NT'FORTYPE WRITERS AND OTHER MACHINES.

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w. T. MACDONALD & B. W. SCOTT. ATTACHMENT FOR TYPE WRITERS AND OTHER MACHINES.

Patented Apr. 16, 1918,

4 SHEETS-SHEE 2.

' APPLICATION FILED APR. I3. 19H.

W. T. MACDONALD & B. W. SCOTT. ATTACHMENT FOR TYPE WRITERSLAND OTHER MACHINES.

APPLICATIQN FILED AFR. T3. 9TH 99 Patented A191116. 1918.

4 SHEETS-SHEET a.

WITNESSES Ml Ell/70H Wl T. MACDONALD & B. W. SCOTT.

ATTACHMENT FOHTYPE WRITERS AND OTHER MACHINES.

APPLICATION. FILED APR. Is, Isn.

Patented Apr. 16, 1918.`

4 SHEETS-SHEET 4.

*entran straatjes earner ritieni.,

WILLIAM T. MACDONALD AND BARTON W. SCOTT,

OF TWO-THIRDS TO SAID MACDONALD AND ONE-THIRD T SAID SCOTT.

Specification of Letters Iatent.

Patented Apr. 16, 1918.

Application led April 13, 1917. Serial No. 161,720.

To all whom z' may] concern.'

Be it known that we, VViLLIAM T. MacnoNALn, a subject ol the King' ot' Great Britain, and Bnn'roN iV. SCOTT, a Citizen ot' the United States, both residents ol San .l ose, in the county of Santa Clara and Stato 0i" California` have invented a new and limproved Attachment for lype-l/Vriters and other Machines, of which the followingis a full, clear, and exact description.

Our invention is applicable to key-operated machines generally, such as typewriters, type-setting machines and the like, in which a Carriage is caused to travel and then return to the initial point.

More particularly, the invention relates to n'ieans ior automatically returning the carriage by a spring motor in which power is stored by the operation of the keys and incidental to the normal functions of the keys in performing the operations o1 printing, spacing or the like.

rllhe invention is characteiized b v novel operations to effect automatically line spacing of the machine preliminary to the automatic return of the carriage under the power of the springl motor.

The invention is characterized also by a drum from which a cord or equivalent ilexible element runs over suitable guides and connects with the carriage so as to be paid out from the drinn as the carriage advances and to be wound up to return the carriage, the drum beine; freed from the action ot the spring motor for the paying out ot the cord and subjected to the action of the motor tor the winding up of the cord, and the connection of the cord with the carriage is through the medium oit a line spacing lever to cause the operation of the latter as a }`)reliminary to the return of the carriage.

The invention is further distinguished by novel means 'for controlling' and releasing the power shaft of the motor so that it will be held stationary during' a forward movement of the carriage and released to effect the return of the carriage.

Characteristic features of the invention also reside in novel trip mechanism comprising elements direct-ly associated with the spring motor, its shaft, etc., and coactmg trip elements associated with the carriage to travel there 'ith sothat the tripping will be automatically and unfailingly brought about at the proper time considering' the tra vcl ot' the carriage. I

.The invention is furthermore distinguished by various novel features of the trip mechanism as will clearly appear the description proceeds.

Reference is to be had to the accompanying' drawings torming a part ot' this specification in which similar reference characters indi ate corresponding parts in all the views,

Figure 1 is a rear elevation ot a typewriting machine showing one embodiment. and application of our invention; v

Fig. is a plan view largely diagrammatic ot' the machine illustrated in Fig. l;

Fig. il is an end elevation of the typewriting' machine equipped with our invention;

Figi'. -l is a detail vertical section of the spring' motor and certain controlling' and trip means, the section being taken longitudinally ot the motor and in a plane transversely ot' the typewriter;

Fig. 5 is a plan view ot the devices shown in Fig. 4;

Fig. 6 is a vertical section. on the line 6 6, Fig. 4;

Fig. i is an end view as indicated by the line 7 7, Fig. Ll;

Fig. is a detail end view and spacing lever controlled motor.

.is stated the invention may be embodied in various machines having' a bank of keys acting' to operate levers or the like, the movements ot which may be utilized to actuatedevices for storing up power in the spring motor. We have conventionally shown in the present example certain parts ot a typewriter, including' keys l0 (Fig. which may in this instance be Considered as printing keys and a spaciingy key, which will operate through ditt'erent instrumentalities in ditt'erent machines to perform various work. As here shown cach key has a lever l1 suitably fulcrumed as at 12, and a vertically rockable lever 13 is shown, and in practice, arranged in any suitable way to be given moven'ient by the operation of any of the keys. The machine may be of the type in which a longitudinal bar 15 is acted upon by the several key levers l1 to insure the operation ot' the lever 13. The parts referred t0 of the carriage by the spring OF SAN JOSE, CALIFORNIA, ASSIGNORS may be as shown or may have any ot the various forms and arrangements found in di'eren't maires el typewriters and other machines, whereby a 1nove1ncnt,bi a key will actuate a le'ver 13 or equivalent means to give rocking movement to a shaft rlhe numeral lo indicates a typewriter' carriage; il', the platen roller thereof; and 18, a linc spacing,r bar. l'lfhe numeral 19 ,indicates the usual springbarrel or typewriting machines, and 2O the strap connecting the saine with the carriage as usual.

ln our invention tue rocking` movement imparted to the sha ft lil thmugh the keys as explained, serves to Wind a motor spring, there being for the purpose a rocker arm 2l on the shaft 14 and extending beneath the tree end of a lever carrying pawl 23, engageable with a ratchet wheel 2i which is engaged in practice also with a second holding pawi or dog` (Fig. l). The lever loose on a shaft 26 on whichthe ratchet wheel 2l is also loose. inlined relation to the ratchet wheel 2l: to turn therewith is the housing 27 ot a spring,v 28, the outer end et which is ce nected with said housing while the inner end oi" said spring is connected 'with a hub Q9 secured to the shaft 2li which turns in suitable ybearings 30.

Loose on nthe shaft 2G is a drum on which winds a cord or other flexible element 32 that runs over suitable guide pulleys indicated ut 3S l and 2) and has connection with the carriagelll, to return the latter under the torce ot the spring :28.

rllhe connection between the cord 3:2 and the carriage 16 is through the medium o'i a spacing lever 34, best shown in Fig. 8, which is roekably mounted lntegral with the spacing lever 3l, or other- Wise made to rock therewith, is au arm S6 which is adapted to press against tue line spacing bar 18 oi the typewriter, said bar being 1n the present instance under the 1nuenee et' a retractile spring 37 of known torni.

lt is to be noted that the .lever 3-1- is not to be confounded with the usual manually controlled line-spacing lever but is pivoted at its forward end and extends rearwardly so that its tree end which is connected with the cord is at the back ofthe machine Also it will be noted that the lever 3l acts directly through its arm 35 against the spacing bar 13 to slide the latter:

ln order to control the drum 3l to permit it to freely turn as the carriage advances and to cause it to turn With the shaft as the latter is turned by the spring motor, the following means is lemphiyr-:d in the illustrated example. A iixed 'ratchet ring or aunuler rack $38 is suitably secured as to liXed brackets 39 and We provide a pawl or pawls l0 engaging the teeth of the lined rack 38 during the forward movement of the carhacerte riage, but shiftable to engage a ratchet Wheel el in fixed relation to the drum 3l to return the carriage. 'f

The pawls 40 are carried on a post. i2 which extends from a shaft i3 in the shaft 26 nt one end of the latter and co-axial there.vith, said shaft 26 being tubular at the said end to receive the shaft. QCS. @ne pawl -lO may vloe carried directly on the post l2 while the other, as shown, is carried on an arin i0 on said post. The' outer end of the shaft 43 has a head le and said shaft passes through an eye pin 45` which extends upwardly into a segment Llli havingvan arcuate slot 4l? receiving` said pin. rlfhe segment Ll@ is on an arni 18 pivotally secured by a vertical pin or shaft 49. rEhe character 30a represents bearings orthe shaft 49, lThe shaft i9 carries at its upper end a bellcranlr lever to one arm 5l ot which one end or' a Pitman is secured. The opposite end of said pitman. is connected with one end ol a retractile spring 53, the opposite end oi said spring being` secured to any lixed cart of the machine, there being indicated for the purpose a listed post or pin The other arrn of the belle-rank lever 50 is iornied at its tr end with a vertical trip member 56, the uppertree end or which lies adjacent to a rock bar 57, figsjl, Q and 3, mounted on the carriage, 1G, to travel therewith. Ilhe bar 57 has side arms 58 rockably mounted as at 59, between the'ends thereof, on any convenient member (SO 01"' the carriage. The arms 58 beyond their pivot are toi-med with forks or sockets 6l receiving the ends G2 oi rocker arms G3 on a shaft (il which also is rockably mounted in suitable bearings on the carriage. The shaft ('-il has a trip arm (36 traveling longitudinally of anyllxed member 67 having adjustable thereon, a marginal stop (i8, that is to say, the -leiit marginal stop usual with typewriters, and adapted' to be positioned to detern'iine the end olf the line. `We form, the marginal stop (38 with a iff-shaped trip meniber Gf) to oe engaged bythe trip arm 6G so the latter will ride up said trip member 6%) to thereby roch the shaft 6% when the carriego reaches the predetermined' end of the line.

As will be clear from B, the automatic rocking oit the shaiit 64- thus brought about will depress the arms said shaft and owinej to the articulation of the arms G3 with the lever arms cs irrying the rock bei :'37, the latter bar lwill be recited upwardly, the purpose oit which is to permit an arcuate movement of the upright member 56 of the bellcrank lever 50. Previous to the nient of the trip member with the tired trip 69, the carriage will have brought the bar 5'? to such a position that a trip member 'l0 on said bar 57 will have engaged the nipmonioer 5S `and will'have moved the recaer@ y same and will have carried the bellcranl: arm 55 from the left hand dotted position shown in Fig. 2 to the right hand dotted position of said figure. The rocking of the bellcrank lever 50 by the trip 70 will have brought the member 56 close to the bar 57 after said upright member has moved through the necessary arcuate path, and'will have so moved the arm 5l of the bellcrank lever as to throw the pitman 52 to a position across the pivotal center -l9 of the bellcrank in position for the spring 53 to exert' a pull on the connecting rod for giving further movement to the bcllcrank 5() and the said movement, of the bellcrank 50 under the tension of the spring 53 will take place upon the upward rocking of the bar 5T and the releasof the upright. member 5G through the rocking of the shaft (-l b v the trips (36, 69.

The swinging of the bellcrank 50 will have given a turning movement to the pin l5) and thereby carried the arm t8 and segment i6 through an agle to engage the pin 45 on the shaft 43. thereby giving an axial movement to the said shaft 43 whereby the post t2 carrying the pawls l0 will be moved to a position to carry the pawls l() out of engag-ement with the fixed annular rack 38 and into engagement with the ratchet wheel il of the drum 31. The release of the pa wls l0 from the rack 38 permits the shaft 2G to be turned by the re-action of the motor spring 28 and the drum 31 will thus be turned to wind up the cord 32 and automatically return the carriage 16. Since however, the connection of the cord 32 with the carriage is through the medium of the spacing lever 34, the initial pull of thev spring on the cord 32 will rock the spacing lever 34 to cause the element 3G to move the spacing bar 1'8, thus effecting the line spacing;l automatically with the automatic return to the carriage. To restore the parts for thc release of the, drum 3l and the locking of the shaft 26, the rock bar 57 has a second trip Tl which upon thc return of the carriage will. engage the upright member 56 of the bellcrank 50 and restore said bellcrank to the left hand position indicated in Fig. f2. it will be observed from Fig. Jr that the upper end of the member 56 is beveled as at and there is a corresponding beveled surface 73 on the bar 57 to permit the return of the member 5G past the said bar. The movement of the bcllcrank lever 50 to the original position will have carried the segment sl-6 in a direction to restore the shaft 43 and post l2 to the original position with the pawls i() out of engagementl with the ratchet wheel .41 of drinn 3l and into cngagenient with the fixed ratchet ring 38 to again hold the shaft 26 against movement for the rewinding of the spring hy the lever 22, pavvl 23, and ratchet wheel it l. The

purpose of the arcuate slot 47 is to permit a material movement of the segment 46 and bellcrank lever 50 by the trips 70, 7l without affecting the pin l5 and shaft i3 so that the final movement of the' segment 4G by the spring 53 will actuate the shaft 43.

vWith typewriters as now generally constructed, the ret-urn ot' the Carriage is arrestedby impact of Ametal against metal which necessarily results in noise and `iars the machine as well as the nerves of the operator. In orderpto overcome the objection of metallic Contact wc provide cushions 74, 75 preferably7 of soft ,rubber on an end of the carriage and on the machine so that in the impact and stopping of the carriage,

the noise and ]ar are entirely eliminated.

le wish to state in conclusion that although the illustrated example constitutes a practical en'ibodiment of our invention We do not limit ourselves strictly to the mechanical details herein illustrated," since manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims.

Having thus described our invention We claim as new, and desire tfsecure by Letters Patent: Y

l. In a machine of the class described, the combination with a carriagethereon, and a transversely slidable spacing bar on the carriage, of a lever pivoted at its front end and extending to the rear of the carriage, a member on the said lever directly bearing against the said spacing bar, a motor,'and means connected with the said lever, and adapted to be actuated by the motor, to rock the said lever and through the medium of the lever to impart a return movement to the carriage. i

2. In amachine of the class described having a carriage; a spring motor, means to wind said motor during a forward move ment of the carriage, a drum, a'iiexible element connected with the drum and with the carriage, means to cause the motor te turn he said drum for returning the carriage,

controlling means for the motor and drumA and shiftable to cause winding of the motor and release of the drum during a forward movement of the carriage and eect driving connection between the motor and drum for return of the carriage, and trip mechanism to shift said controlling means, said trip mechanism including trip means adapted to engage the controlling means, as Well as trip means travelingr with the carriage to actuate the first trip means, and relatively fixed trip means on the machine to engage the trip means on the carriage.

3. in a machine of the'class described comprising a carriage, a spring motor, a drum, and means vconnecting the 'carriage with the drum; the herein described, controlling,s

gli;

meansl for the motor and drum inciuding a ratchet Wheel turning with the drum, a paWl subject to rotary movement by the motor, means to engage the pavvl with the ratchet wheel and revolve the engaged paWl and ratchet Wheel to canse the drinn to return the carriage, and means operable by the return cti the carriage to disengage the paWl from `the drum and lock the paWl against Inovenient by the motor;

Il. In a machine of the class described9 having zii/carriage, a drinn, a ieriibie element connected with the carriage and adapted to be wound upon the drum to return the carriage, and to unwind asthe carriage inoves forward, a shaft cn Awhich the drum is loose, a niotor spring on the shaft, means to Wind the spring to store power therein during a forward movement of the carriage, a ratchet wheel on the drinn, a shaft (5o-axial with the first shaft and adapted to turn therewith and to slide, a pand carried Icy the secondshat and movable inte and out of engagement 'with the ratchet Wheel on the drum by the sliding of thesaid second shaft, relatively ined ineens to hold the pawl freni Inove- Inent when disengaged from the drinn, controllingv means connected with the second shaft to slide the saine and shift the pawl, and trip mechanism for the controiling means7 said trip mechanism including trip means on the carriage, means te trip said controlling means hy said means on the'carringe, and enacting Atrip means on a relatively fixed part of the machine 'to engage the trip means of the carriage.

5. An attachment for machines of the class described. having a carriage, said attachment including a motor spring, ,a shaft on which said spring is mounted, a ratchet Wheel con:

l nected with the spring to Wind the same,

means to aetuate the ratchet Wheel7 a drum loose 'on the shaft, means to connect the er neeaee drum with the' carriage to return the flatter, a ratchet Wheel 'on the drinn, a nnlar rack adjacent to the ratchet Wheel ot' the drum, a pawl, an element between the druln and fixed rack and carrying said paWl, said eicrnent being shiftable to carry the paWl to positions to engage the ratchet Wheel ci the drum or the fixed rack, a shai't c0- axiai with the first shaft and secured, to said element, a pin having an eye embracing' said second shaft and adapted to shift the latter, and means to move said pin in opposite drections, said means being controlled by the movements of the carriage.

d in a .machine of the class described com prising a carriage, a spring motor, a drum, and means connecting the carriage with the drinn; the herein described controlling means for the motor and drnni including a ratchet wheel turning with the drum, a fixed annular rack adjacent to the ratchet Wheel of the drum, a pawl, an clement between the Ydrum and the fixed rack and carrying said pawly said element being shiftable to carry the pawl to positions to engage the ratchet Wheel of the drinn er the fixed rack, a shaft coaxial with the drum and secured to said element, a pin having an eye embracing said shaft adapted to shiftthe latter, a pivoted member having a segmental slot 'receiving said pin? an upright shaft on which said slotted member is mounted, a bellcranlr lever on said upright shaft, a retractile spring, means connecting one end of the spring with an arm of the bellcraank, the opposite end of the spring being relatively tinted, an upright trip member on the second arm of the lcellcranlr7 and coactingtrip means governed by the movements of the carriage to engage the said upright trip member.

'WLLAM T. MACDNLD BARTON ld?. SCOTT.

tired ani 

